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The K coefficient is a parameter that in-
creases or decreases the boiler delivery
temperature as the outdoor temperature
varies.
When installing the external sensor, this pa-
rameter must be set based on the efficiency
of the heating system to optimise the deliv-
ery temperature.
With heating temperature setting 28-55°C
(Figure 5.29) or temperature setting 50-
80°C (factory set) (Figure 5.30) (see "Se-
lecting the heating temperature set" on
page 47).
Delivery temperature °C (28-55°C)
60
55
50
45
40
35
30
25
20
30
25
20
15
10
K=0.2
K=0.5
K=2.5
K=3.0
Figure 5.29
Delivery temperature °C (50-80°C)
85
80
75
70
65
60
55
50
45
30
25
20
15
10
K=0.2
K=0.5
K=2.5
K=3.0
Figure 5.30
INSTALLATION
5
0
-5
-10
-15
External temperature °C
K=1.0
K=1.5
K=2.0
K=A52
5
0
-5
-10
-15
External temperature °C
K=1.0
K=1.5
K=2.0
K=A52
Sequence for setting the K coefficient
• Enter "programming mode" by holding
down buttons 18 and 19 for 5 seconds
at the same time (Figure 5.31). The code
P00 appears on the display, indicating en-
try into "parameter P00" (Figure 5.32).
13
14
Figure 5.31
-20
Figure 5.32
• Scroll through the various parameters us-
ing 13 or 14 until the LCD display shows
the code P07, indicating entry into "pa-
rameter P07" (Figure 5.33).
Figure 5.33
• Press 17 (Figure 5.31) to show the value
-20
of parameter P07 on the LCD display (Fig-
ure 5.34).
19
18
RESET
bar
RESET
bar
- 45 -
17
16
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